To the two who stood watching while the darkness swallowed it up, it seemed a dream of wonder, with its tale of human energy, of things being done, of employment for thousands upon thousands of men, of opportunity and freedom, of life and love and joy.

b. the american revolution

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.

answer; shipments were made easier,and trade was easier;